Blacksmith s punch



(NoModeL) 1 M. C. BRANDENBERG.

BLACKSMITHS PUNCH. No. 314,647. Patented Mar. 31,-1885.

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mam/Mk JQZLZQM j/igi arnr YFFICEQ' MARTIN G. BRANDENBERG, OF CAMBRIDGECITY, INDIANA.

BLACKSMITHS PUNCH.

SPECIFICATION forming part of Letters Patent No. 314,647, dated March31, 1885. Application filed July 28, 1884. (No model.)

To all whom it may concern.-

Be it known that I, MARTIN C. BRANDEN- BERG, a citizen of the UnitedStates, residing at Cambridge City, in the county ofWVayne and State ofIndiana, have invented certain new and useful Improvements inBlacksmiths Punches, of which the following is a specification,reference being had therein to the accompanying drawings.

My invention relates to that class of punches operated by hand and usedin making holes in the common varieties of plate-iron while cold.

My invention consists in a combination of mechanical devices by which apunch is constructed, which may be operated by handpower, havingsufficient power to produce holes in ordinary plate-iron, and soarranged as to admit of the use of punching-tools of difi'erent sizes,which may be used interchangeably.

In the drawings, Figure 1 is a perspective view of myimproved punch inworking form.- Fig. 2 is a central vertical section of the same showingthe working part. Fig. 3 is a perspective view of the lever-shaft whichoperates the punch by means of the handle.

In Fig. 1, Are'presents the stock ofthe punch provided with a verticalflange or facing, A, having holes for screw-bolts by which it is securedto any vertical surface for support. The front portion of the stock isprovided with a rectangular recess across the horizontal plane of thesame. The upper and lower surfaces form jaws in which the iron is placedto be acted upon by the punch-point. The lower jaw has a sliding-platedlet into the same, the upper surface of which is flush with the surfaceof the jaw. The sliding plate f is pro vided with a hole immediatelybelow and in line with the punch-point and sheath 6, said holecorresponding inv size with the punchpoint e, which is'inserted in thesheath 6 and is removable.

e is a sheath of cylindrical form and is fitted 5 at the upper end witha cross-head, g, and at the lower end is provided with a longitudinalopening to receive the punch-point e, which is held in position by aset-screw, d.

D, Fig. 3, is a lever-shaft journaled horizontally in the upperportion0f the stock, one end being made square, to which a lever or handle maybe fitted, as seen at b. The bearings of the shaft to a are of equalsize, and the central portion of the same is cut away, leaving a portionof the body eccentric to the center line, as seen at a, forming a crank,which, when the lever is turned to produce a partial revolution, raisesand lowersthe sheath e by its connection with the cross-head g, and, asthe lever is raised and lowered, the punch 6 carried by the sheath 6 isgiven a vertical reciprocating motion, as shown by dotted lines in Fig.2. The lever or handle a has a square mortise, which fits upon theshoulder b of the lever-shaft D, by which it is actuated in operatingthe punch and sheath.

The stock A is bolted in any suitable manner to a vertical wall orframing at a proper height for operating.

Having thus fully described my said invention, what I claim as new, anddesire to secure by Letters Patent, is

In a blacksmiths punch, the stock A, levershaft D, constructed asdescribed, sheath 6, punch-point 0, combined with the lever c, andcross-head 9, all substantially as set forth and described.

In testimony whereof I affix my signature in presence of two witnesses.

MARTIN O. BRANDENBERG.

Witnesses:

W. T. DENNIs, MARY E. PRESCOTT.

